Don't be daft, nothing wrong with them! It's the fuckwits that adjust them with NO adjustment to the map that are wrong!
You can set an actuator to give more than std boost, should we bin them too?
Silly post!
Correct.
Do you guys twiddle your fuel pressure regs too?
They do remove the ecu's ability to lower boost if you actually replace your boost control valve with one instead of fitting it in adition to it, but they are no more dangerous than an amal valve providing:
1) You use a quality one like
this:
2) You set it safely, which usually means letting a tuner set it.