Will my boyfriend with a felony conviction be allowed entry into Thailand?

The discussion centers around the entry eligibility of a U.S. citizen with a past felony conviction into Thailand. Multiple responses suggest that Thailand does not typically conduct background checks for entry, indicating that past felonies in the U.S. may not be a barrier. There are informal comments supporting the opinion that entering Thailand should not pose any problem. However, opinions vary on the complexities of obtaining a marriage visa for a long-term stay following the marriage, with suggestions that it may be straightforward in terms of getting married, but could involve documentation hurdles for long-term residency.