Surely this is a simple software problem? - I am no expert on PCs but I find it difficult to believe that posting in the rest of the forum cannot be disabled until after a post of a minimum number of words has been posted in the Welcome area.
Alternatively is AoS too big to allow this to be manually controlled by the Mods/Duty Mod (if such a position exists).
If all else fails build in some sort of delay between Welcome post and next post to allow the mods to authenticate - it might restrict the flow of members but it would do a bit to encourage only serious members to get involved, rather than 'serial enrollers' (zero posters, of which AoS does seem to have rather a lot IMO?)
Dave.
DaveK.
My System:
Power: Belkin PF40, Custom.hifi.cables Hydra and DC PSUs.
Sources: Self built HTPC with Xonar ST sound card, NAD T585 multi disc player, Sony BDP-S350, Squeezebox Touch, Techncs SL1210 (mod'd) + Nagaoka MP30, Thomson Sky HD box.
Amps etc.: 2 x Mini-T amps, MF-X10D Valve buffer clone, StanDAC 7520/Caiman (mod'd).
Speakers: Mission 774s with added super tweeters
Cables: best I can afford and likely to change except Homar's RF attenuated co-ax's and Mark Grant USB and HDMI cables. I also like silver i/cs and speaker cable.