The point is, as SpoilerVirgin just pointed out, that it’s one of the rules of MPSIMS. Also, lest you try it elsewhere, it’s also in the “Guidelines and Etiquette on the SDMB” FAQ:
It’s a matter of courtesy to your fellow Dopers.
And if you have a complaint about my moderation, take it to ATMB for discussion. Don’t do it here.