What do you consider 'maintenance'? In your book, are security programs that block adware and malware or scan for and remove
adware and malware a 'maintenance' service?
You can install and run security programs and simply disable them if a website doesn't function with the security programs monitoring in the
background. But I would be very concerned about any website that required the disabling.
You can run programs such as AdwCleaner, Junkware Removal Tool, the free MalwareBytes AntiMalware and do a free scan using Eset Online
Scanner that don't monitor in realtime/ in the background. There are other good programs that will freely do the same.