No rash guards on water slides?

I'm pretty sure these parks aren't making rules to give people a hard time. If they have a no shirt rule on a particular slide, chances are that someone got stuck, and the park felt it was a safety hazard. The employees working probably just thought a "rash guard" fell under the no shirt policy.

If you ever feel like something isn't right, speak to a supervisor or someone higher up, and kindly explain everything. Maybe they can provide a better explanation or notify employees that "rash guards" are acceptable (if they are).

What Ffej said. Wildwater Kingdom doesn't have such a rule in place for no reason.

Said conversation just might prove constructive if one can get through the conversation with a straight face whilst uttering the term "rash guard" repeatedly.