No, this is a private company and they are not legally required to permit everyone access to their events. You can go in disguise, but they can kick you out if you are discovered. Your best strategy is to ask to meet with them to discuss the matter. Otherwise, go public with your complaints on your blog.
As a private company than can exclude anyone they want. I suspect there is something else going on here.
I am a former federal and State prosecutor and now handle criminal defense and personal injury/civil rights cases. Feel free to check out my web site and contact me at (212) 385-8015 or via email at Eric@RothsteinLawNY.com. The above answer is for informational purposes only and not meant as legal advice.
This is not a legal issue and you have no legal recourse. Your blog appears to be independent from the Bills / Jills organization, and even if it wasn't, there is no legal recourse.
The Jills can and have decided to distance the organization from you. It is unfortunate, but they are a private company and are perfectly entitled to do so.
Similarly, just because you feel a bit awkward about not being able to go to the intimate venue with ~70,000 other people: it doesn't seem as though the team canceled your season tickets and / or publicly admonished you in any way.
Personally, I would remain nothing but professional in the writing you do on the blog or -any other social media- if you wish to get to the bottom of the matter; badmouthing and the like will most assuredly not result in a good outcome.
Reaching out and being persistent -but not overly so- about engaging in a formal meeting to determine why you and your independent blog are being shunned is probably the most prudent of action to take.
Best of luck in establishing contact and coming to a positive conclusion.
As an aside: hopefully this will be the year that ends the playoff drought!
All of the advice you have received here is correct and exceedingly gentle and kind. For some reason (and perhaps you truly do not know the reason) the organization does not want to be associated with you any longer. That is the organization's right. The fact that legal counsel may have advised the org that it has the absolute right to take that position does not make it a "legal issue" that creates any legal rights for you.
Let me go out on a limb here and offer you some real-world advice: go where you are wanted and appreciated. Find (develop) some new and unrelated interests. Diversify in the activities and interests of your life. You cannot force people to like you, but you can start a new page with new people in a new circumstance, applying the lessons of what has and has not worked in the past.
My responses to questions on Avvo are never intended as legal advice and must not be relied upon as legal advice. I give legal advice only in the course of an attorney-client relationship. Exchange of information through Avvo's Questions forum does not establish an attorney-client relationship with me. That relationship is established only by individual consultation and execution of a written agreement for legal services.