@Levitator - It's very bad form to accuse people at a church of being abusive to their children. You're creeping people out and scaring them when you do that. Everyone at church knows that they are sinners and your emotional outbursts about specific people and what
you deem to be their specific sins is out of line. Church members are not supposed to judge one another as the Bible makes perfectly clear. They pray for others.
There have been numerous church shootings in the US and churches rightfully are on full alert to avoid it from happening to them. I'm not very religious but I do respect churchgoers' right to worship in peace, without unstable, emotional outbursts from someone who just showed up for a service.
Next time, bring your own guitar. And bear in mind that people attend church to worship God, not to deal with some stranger who wants to use someone else's guitar to play non-secular music at the service.
Yeah. I’ve spent many thousands of hours on or around church stages, even sat in with the musicians several times. Because I am naturally security conscious and also was in leadership, I kept an eye around.
I don’t remember anyone ever grabbing an instrument. In my experience, those instruments are expensive and don’t belong to the church. My instrument was e-drums, fairly indestructible but for the cables, but I would not have allowed a stranger to sit at my kit, certainly not during a meeting, and would have found it somewhere between rude and confrontational if the person persisted after being rebuffed.
Now, people who grab other people’s musical instruments without first getting permission from the owner are liable to get noticed, especially if they are persistent after being schooled in the local etiquette.
As an elder, it would have fallen to me to respond to someone playing non-worship music while congregants were still about. Our worship services were carefully arranged to focus the mind on the Lord, not on a common appreciation of beautiful music. Worship leaders are usually very carefully selected for their ability to keep the music focused, not so much on their ability to enjoy fellowship with roaming musicians.
Be aware that many parents of youthful daughters are constantly vigilant on their behalf. If someone approaches their daughter, they will take a protective stance, at least partly because God teaches them to do so. If all the parent knows of the stranger is that they grabbed a guitar, started playing music and had to be stopped, they are more likely to take a preemptive approach.
I’d point out this. You said you’ve had three very brief encounters with this young lady. She told you she cleans the family home. Unless there’s a lot you didn’t tell us about those conversations, it’s more than a mere leap to accuse her parents of slave labor. It would appear that you know nothing of those people.
If the guy that grabbed the guitar is the same guy accusing a congregant of slave labor, you can expect church leadership to take a defensive position.
What music you personally find appropriate at a church meeting doesn’t matter. Your personal wish to play someone else’s instrument is irrelevant. Your opinion of how that woman’s family divvies out household chores is entirely irrelevant.
While open to the public, church buildings aren’t publicly owned. Congregations are like extended families, and when you walk into that building you are a guest in their home. I submit that, if you walk into your average church and act like a respectful guest, you will garner a much more pleasant reception.