Thanks Spybotsandra and Yodama
Perhaps "responding in kind" is not always the best way to confront a business which is using unfair business practices. This simply makes Spybot look like they are party to bickering. What would be more useful for me as a regular user of spybot, is that an explanation like the one you've given in this thread to appear in the tip which pops up, i.e. that Trend Micro improperly identifies Spybot in a similar way to a "False Positive" of sorts, and it may ask you to uninstall it. Additionally, it's possible to write to Trend Micro yourselves as well as asking your many many long-time supporters to write to Trend Micro and confront them directly. Spybot has no problem with its value as a tool and has been constantly verified as one of the tools most highly recommended by all the malware removal forums, so Trend Micro doesn't have a prayer in any efforts they make to suggest to the public that Spybot needs to be removed. I personally think a direct confrontation with them would be more useful and a simple note to Trend Micro users who are running Spybot to ignore any warnings Trend Micro may give them to uninstall Spybot.
As for McAfee, I can't imagine it impairs user control more than Nortons does. However, I will read the documentation you make reference to.
Thanks for your information.
Alenz