Please accept our apology for such inconveniences. As tixer stated, it is simply one of several tools we use to help control spam. We welcome guests to view our forums and share in the vast knowledge of our community of enthusiasts of the Lincoln brand. The intent of the post limitations is to make the forums a better place to be.
I realize you don't see it as an issue, that is because our measures have proven to be helpful in battling hundreds of spammers per day. As an open public forum, we are literally under attack every hour of every day from spam. We are always seeking to strike a balance between user friendliness and keeping the forums free of such unwelcome visitors.