Stopping at Wal-Mart parking lot stop signs?

It is unlikely, but it is possible. Some parts of some shopping centers actually are dedicated streets, so the local constabulary may be able to enforce traffic violations in those areas. However, the individual who did not care for your driving practices would not be able to give you a ticket, nor would his turning you in result in you receiving a ticket.

By the very nature of Avvo, you have only provided limited facts and no documentation, therefore, our response to your question is treated only as a hypothetical, and as such it is merely general in nature. You should not rely on this response in taking or forgoing action in your circumstances without discussing this matter with an attorney. If we had the opportunity to ask you sufficient questions and review relevant documents so that we were satisfied we had all of the relevant facts and circumstances, our response might differ significantly. Without the opportunity to ask you questions, and review all relevant documents and memoranda, we are simply unable to provide any form of legal advice. Our response to your question does not create any attorney-client relationship between us, and we are not acting as your attorney. We reserve the right to decline representation in any case. By answering your question, we are under no obligation to answer further questions. There are very specific deadlines for filing a lawsuit, replying to a lawsuit filed against you, or taking other action in order to preserve your legal rights. You should contact an attorney immediately in order to be fully advised of your rights, and so that you are aware of those deadlines. If you fail to act within the required time frame, you might be forever barred from asserting your rights or defending your position. The attorney answering this question is licensed in Illinois and Iowa only.

You will want to see if the municipal ordinance lists that location as a controlled stop. If not, then it's probably not a violation.

Anyone can put up a stop sign on their property, but that doesn't mean it's a violation to pass it, obviously it has to be placed by an official party. If you are in a private lot, it's a good idea to stop anyway, because other people (like this guy) are probably using it as a guide. You won't get a ticket, but you don't want to hit anyone, either.

This is AVVO, a place for users to obtain general legal information to general legal questions. I am glad to help you in any way I can, within those limits. I wish to make clear I am only communicating with you for the sole purpose of exchanging such general information, and nothing more. It is not legal advice, which I can not provide because among other reasons I know few of the necessary details of your situation. I do not purport to represent you in any way, shape or form. Of course, if you would like to seek out my services, and if you are a NY resident, I will probably not put up very much resistance but representation would still necessitate a signed retainer agreement between yourself and I. Thank you.