Hi John,
They may be a possibility that it won't be added to the server. Due to it wouldn't be fair for the players that don't know how to install mods. Also, it could cause a lot of issues with the Wild/towny system too, as the modded blocks may not be working good with that. And it could cause a lot more issues down the line. Etc: If the mod breaks or something like that, the admins won't be able to fix it (As they didn't create it) and the 'modded food' will be broken etc.
If you get what I mean?