Fello members , no incoming link can ever harm you according to google webmaster forums . Please read that! Still if the forum owner is discouraging you from posting links then please respect his opinion , its his forum after all
No incoming links can ever harm you , even if from bad neighbours , it will harm you only if you link out to bad neighbours. Google understands that a webmaster cant control links pointing towards his domain , and they wont be indexed as "for sale" or something lol.