This talk seems rather stupid tbh (seeing a mod(s) stating that using that command is acceptable for the sole purpose of provoking/trolling is even worse imo - Yes mods are players, and they do like to have fun while playing too, but as a mod, you should know where your limits are, and not cross them - Don't forget that in the end, your behaviour/actions are taken more in consideration than a non-mod player, as you're representing ENT's public image)
People started using this command since they noticed that abusing the !slap command was bannable: As usual, one gets reported for abusing/breaking one rule (aka !slap command), ban is applied and what happens after? People find a new way to bend the rules, and found a new command that does the same as !slap.
Using !sd, !lms, etc. doens't give info to anyone else but urself (it's sent in private, not global) - using !is sends the info in all chat, and i cant see any reason for non id players to use it, besides an attempt on bending the rules to avoid using !slap.
So either ban the usage of !is (such as !slap already is, when used to provoke/spam), or change the command to simply give the info to the person using it (instead of spamming through global chat).
PS: Might add that this seems to be a problem affecting only the LoD dumbos (i havent seen anyone using it on LTD or DotA at all)
PSS: Personally i dont mind the usage of !slap command when people know limits (using it once in a while ingame, can be fun - i also do it myself), but when people dont know limits (or write random/stupid stuff over it), it might annoy ppl (As for me, i just wait for the next time one of them dies, and throw it back on them
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