Bypass detection on start

[prj]

Some protectors, e.g. Obsidium fail to start the app even if a debug tool is running and generate an error message.
For example IDA or Ollydbg.

I don't mean trying to actively debug anything or attached, just having the app open generates an error message.
Is it doing a simple loaded module check/window title scan or something?
IsDebuggerPresent and friends should all be false, since no debug functionality is being used at all.