You know, if "they" conduct completely random searches/etc at airports, everyone thinks them silly and cruel (if that randomness happens to intersect assorted minority groups like the disabled.) If they look for "suspicious" clues and behavior, they get accused of racial profiling, discrimination, and thug-like behavior. It's a hard job to do well, and impossible to keep everyone happy. Whether you like it or not, being an electronics hobbyist really does mean that you are statistically more likely to build an electronic bomb timer. And those lists didn't seem all that unreasonable in terms of defining "suspicious" behavior, either. (Aside from both "unusual interest" and "no interest" about certain topics both being suspicious.)
If you're willing to let it affect your behavior, that's your problem. Don't forget that it'd probably be much more dangerous to piss off your neighbor by trimming his tree that overhangs your yard, so that he calls an "anonymous tip" into some agency.
"MAKE like no one is watching."