Just be careful, don't put any thing like "I'm so and so on Dis" or "meet me on the Dis!" or elaborate at all what Dis means, you ,may get in trouble and be asked by staff to change your signature. If you do put Dis in your sigature, leave it at the word Dis. In other words, have a signature like "Llamas are trouble, Rawr. !Dis!". As long as you just have the word Dis and nothing else explaining it, you should be ok.

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-CapElDano