The fastest and most reliable method of obtaining such information can be done by contacting customer support.
-TunaShake
I know referring people to support is the only assistance you can provide on such matters... but to suggest this game's support is either fast or reliable is an absurdity.
1. Placing electric towers by gate hammers to make them disappear?
2. Entering when gates glitch sideways?
3. Flame towers placed in the walls behind the opponents throne?
4. Placing flame towers/electric towers on the top of the castle where you rez?
5. Using FoT's on the gates (lately seawash stones have not been working even with several placed)?
6. Sending pets through walls to take out buildings or throne?
Disclaimer Note: The following are opinions based in common sense, and may not be understood by those with tiny brains.
1 & 2. These have never had any sort of frogster confirmation or denial. However, if we want to apply common sense to these... the destruction of guild castle rebuild points & the crooked gate rebuilding are known bugs. So, if a player is intentionally using said bugs to gain advantage over other players, then that is technically an exploit subject to part 3 section A of the terms of service:
From the Terms of service, part 3 section A:
"You may not use in Game play macros or other stored rapid keystrokes, "dupes," "cheats" or
other patterns of play that facilitate acquisition of items, currency, objects, character attributes,
rank or status at an accelerated rate when compared with ordinary Game play."
Siege rewards are items, honor points are rank, your guild's siege score is status. By exploiting bugs to win or give yourself advantage to win in siege, you're using a "pattern of play that facilitates acquisition" of these. The primary problem with this applying to points 1 & 2? Proving it to a support staff who takes almost a month to even review whatever evidence you bring them.
3 & 4. These are as the items you describe are unfortunately (and poorly) designed. This is more in the "dirty gameplay neighborhood" as a flame tower shooting down through a ceiling or in through a wall does not facilitate the acquisition of items as points #1 and #2 do. If you're playing siege correctly, the moment a throne, gate, or building begin to take damage alarms should start sounding in your voice chat or guild chat alerting the entire guild to take action. Flame towers & electric towers are not going to destroy your guild throne in 1 hit, nor are they going to destroy it in 20 or 30. The placement of these towers at those locations only serves as a distract/delay in siege, and does not generally change the outcome.
5 was stated by the GM's somewhat recently to be acceptable as part of the standard gameplay of ROM. It is a common consensus among most players it is a dirty tactic, but it is not unacceptable gameplay.
6 can also be rephrased as "exploitation of line of sight." I can get into detail about how these are exploits, but instead of typing it all out again, check out my post history and see where I've chimed in about the exploitation of the line of sight dynamic time and time again.