It's popular to make your mechanic one of your front-row or at least second-row characters, so they can detect traps before someone else in your party trips them! Do this, and/or use the option to auto pause when detecting hidden objects, to help avoid tripping traps.
If you detect a trap that you can't disarm, either leave and come back at a higher level, or send your party back and have your tankiest character set it off.
Removing all those traps is great experience and money. i'm not one to set traps. anyone out there finding any usefulness in doing so?