because they're clueless 12 year olds
the single most annoying thing in the entire universe
This, but partially because they may be mis-guided. In the Civil Air Patrol, a few of my friends really look down on Boy Scouts, its hilarious really. However, when we were laying wreaths for veteran's graves on Christmas, boyscouts were clueless as well. They were:
1. Taking no thought in the event
2. Taking armful of wreaths and just throwing them everywhere (Upside down, backwards, abhrlzht)
3. Stepping on peoples graves by accident
4. Prancing around a national cemetery like idiots
We got there and immediately:
1. Carefully Fixed the stuff they caused
2. Scolded them for walking on graves
3. Saluted every grave.
I think some boyscouts just lack customs and courtesy, and then if one person does something, they all follow along thinking "its so funny."