@cyberczar @betafive @orobouros @bobjonkman2 @dragnucs I'm pretty sure there is some instance-blocking functionality already in !Gnusocial. Back when Evan's company was the primary host of !StatusNet, some spammer instances arose that started randomly mentioning people by their full # addresses. After a short time, this stopped happening. That tells me that the spammers' instances were blocked.