If you had spent as much time on avoiding your overstay as you spend on asking these questions, you'd be in a better place.
What I wrote wasn't "reasonable speculation", but based on many reports from overstayers I've read. Very few had problems with regards to entering other countries with a Thai overstay. In fact the only problem I remember was with Lao Air refusing to take people with an overstay to Laos, ariund the time when Thailand introduced blacklisting.
If you're concerned, fly home first and get a new passport there. While that doesn't wipe Thai immigration's record of your overstay, it will ensure that IOs in other countries won't see any potentially incriminating stamps.