So what is wrong with a damn water fight? People get wetter than that in the shower.
Or, maybe it is "immoral" to have any fun. Muslims are famous for that--some more liberal denominations are less likely to go after everything that is fun, but those in government positions are not the moderate versions. Most of the Muslims in government are likely to be the ones that insist that all fun is immoral. Which is why you have "morality police" making sure women are veiled at all times (maybe it's because it's so damn hot out that they don't want those veils?). They also have strict rules about fasting during Ramadan--I can see not eating food during daylight hours during Ramadan, but they can't even drink water. They also can't eat or drink until "one cannot tell a black thread from a white thread by natural daylight". From my experience, this happens to coincide with navigational twilight--which, north of 55 o N, can be all night at certain times of year.
I don't know what those Muslim pigs are going to do in the next 6 or 7 years when Ramadan straddles the longest day of the Northern Hemisphere year. At latitudes around 30 o N, aside the heat, it might not be too bad. However, at around 43 o N, the "navigational twilight" cutoff can be as late as 9:40 PM on a clear evening, and I have seen light enough to tell a black thread from a white one at 4:20 AM on a clear morning. And, it gets worse as you approach 50 o N--having to wait until 10:30 PM and having it get too light as early as 3:30 in the morning in places like London. I can only hope those idiot rulers get stuck observing Ramadan in a place like Fairbanks, Alaska where civil twilight can last all night during the whole of Ramadan (and will in around 7 years). Let them starve--remember, they are not just to abstain from food but also water.
The witlesses are almost as bad. While they might not get put to death for eating during the day during Ramadan, they have their own ways to waste people's lives. Field circus can be a burden--and not just during Ramadan (which is intended to spread the misery so everyone must feel it). They are also as likely as not to get hounded for using a water gun (a water bomb is just as likely to net a hounding). They also ban just about everything that is fun--if not at the organization level, at the hounder and hounder-hounder level.