My experience was that the Fire Dept is the authority that said nothing is to be in the hallway because, in case of an actual fire, evacuation of the shareholders might be delayed because of various items in the hallway.

Remember that during a serious fire (which can break out in very little time), the hallways may become pitch black due to smoke. If people have any objects impeding their escape route, there could be deaths and possible liability to the co-op. The worst of both worlds.

If you say that you're being unfairly singled out for your doormat while others are allowed to keep their items (bikes, strollers, etc) in front of their doors, then I recommend that you take video of these other offending objects. This can then be given to the Board as proof that the rule is being unfairly applied to shareholders. Then ask the Board why YOU are getting the eviction letter and the other shareholders (s/h) are not. After all, aren't the other s/h violating the rules, too?

In order for a Board to be respected and successful, they must apply the co-op's rules fairly and across the Board. If you're being singled out while others are not being penalized, your video proof will stop all talk of eviction.

One last thing, keep all documentation - legal letters, emails, phone calls. Anything and everything. You may need it in the future to support your claims.

Good luck and please keep us posted.