Some mothers seem to just run on "worry" as a fuel. My mom does and I'm 38. We live in central CT and were heading to VT last weekend to go camping...well, with hurricane Earl headed in the general direction of New England my mom was worried about us and called on Thursday night...giving me times of forecast rain and wind etc. I pulled up their forecast and current conditions (they live in FL) and rattled them off and told her I could stalk her as well...then I asked if she thought she did a decent job raising me to watch the weather and trusted the judgement that they've taught me (and we've camped my whole life! Not like camping and outdoor activity is some new-fangled thing) I then asked her if my dad knew she was calling and made her put him on
Reassure your mom that you'll be watching your surroundings and do check in from time to time to let her know you're OK. To be honest, if a sex offender were to go to WDW, I'm pretty sure it wouldn't be 25 year olds they'd be after, unfortunately. Also, statistically, sex crimes are usually committed by someone the victim knows. The random acts are more interesting for movies, books, and internet warnings, but are not how they typically happen (not saying the random stuff never happens, of course...but statistically you're pretty safe)