I've had one one set up for a little over 2 years. And I understand the apprehension. I get nervous too sometimes, but like anything, it's what you make of it.
If you suck every dude that messages you and don't ask for any pictures, that would be a mistake that could end badly.
I am picky and selective. I only suck the dicks I want, and I only respond to the profiles that I want to.
Preferably, an attrative slim younger dude with a completed profile and linked instagram messages me. In the rare instance this happens I'm not nervous at all. Mostly those are the guys with nice cocks who have too many offers to waste a load on a gloryhole. Sad.
I prefer profiles I recognize, not brand new ones. I break this rule sometimes but with much considerstion.
Obviously most who respond to a gloryhole are the more discrete types. For me, it's a lot of filtering. Maybe it's my area but many of the cocks messaging me are literally nothing special and not attractive to me. Let's say I do get a nice one but it's a blank profile...if the pics look like they were taken several years ago, I'm out.
So for me there is a lot of vetting. I also have doorbell camera which gives some additional security.