Sorry, I missed that post you wrote to The Sceptical Chymist, so I'm not sure to what you're referring.  As for tagging alts of known scammers, of course I'm in support of that, given the evidence linking the accounts is compelling enough that a reasonable person would be left without a doubt.  I left that post in Poker Player's thread rather brief on purpose, because there seems to be this attitude among some DT members than anyone with an undisclosed alt is up to something nefarious.  I find that assumption simply absurd.