To be blunt, you cannot totally protect yourself from being subject to the squelch option. It is primarily a social system intended to allow the denizens of a realm to address spam. While it mostly focuses on advertising spam, like gold and illicit services, it also serves to deal with other spam.
You can probably reduce the likelihood that you’ll be squelched by reducing the number of times that you advertise. Your entire advertising line is fairly hefty and if I had to guess, that coupled with the frequency that it is being thrown out in Trade is not being positively received.
Looking at the reports and a chat search over the last few days, I’m afraid I can see the reasoning behind the reports and the current silence.
Can it be abused? Yes, unfortunately, there are limitations to a system like that. Easily? I would argue against that in most situations.
If you wish to appeal the silence, you can submit an appeal ticket and a Game Master will review the matter.
If you’d like to see a change to the reporting system, you’ll want to submit your feedback via the submit a suggestion option in the in-game help menu or by posting in the General Discussion forum. I’m afraid CS has no input on game or system development.