Admins/mods ignoring me.

[Avgar]

I think if your lucky and your there at the right time in the right space, you can call in with a successful reply. However, it may increase your chances if it's a fully developed report. For example you don't want to write this - "OMG PLS HELP ME, ADMIN TO ME" but instead right this " There is a prop minge on (whatever street) they are masspropkilling people. There is also a backseat admin handcuffing the prop minge. If you could come help that would be great." (<- Not sure if that would fit...) So yeah, I think that's the way.

That would fit, definitely.
It helps greatly to know as much information about a certain situation as possible. Once a mod/admin teleports to respond it's much easier to get their bearings if they know which location/which player/which rule break to look out for.
The more precisely you write out the issue in @ the higher priority it gains (with exceptions, of course) in scope of multiple requests. If I receive two consecutive calls for FailRP, for example, I will check out the one that is more informative and therefore smoother to deal with first.