As noted earlier, "However, there's a great difference between having such registration and being able to successfully enforce it. In this case, any attempt to force an "infringing" party to cease using the term "
SEO" would undoubtedly result in a counterclaim that the registration is invalid, owing to said term having been in common use prior to the claimant's filing, such that it now in the public domain."
I very seriously doubt that Jason will realize much beyond his 15 minutes of fame from this endeavor.
By the way, one need not appear in person in order in order to formally oppose such filings.