SteamID should be: STEAM_0:1:36467260
The one warning doesn't give me much pause and was 15 days old, so I'm not concerned with any sort of behavioral pattern. Your relative inactivity on the forums is a sticking point, but since your account is less than a week old, that's not too surprising. Generally, we like to see a minimum of 25 posts on a forum account to show that the candidate is invested in interacting with the community. I'd recommend providing your input in the suggestions or putting forth your own suggestions, interacting with people in the other portions of the forums, and generally, get more involved. Regarding question 15 you explain that you dislike seeing people breaking rules, but you don't really explain how you being added to the staffing team would benefit the server. What are some of your attributes that would be helpful?
Regarding question 16 you talk about some things that you would do that would be helpful, such as checking logs for evidence, gagging the person (though you use the term "mute" which only stops them from using text chat"), and checking their discipline history (very impressed you checked this, by the way, very few people think to check for these and having this information can absolutely change how you handle a situation, so well done there!). However, if I understand correctly, you plan on only issuing them a verbal warning for their conduct. While you would have a significant amount of discretion as a staff member, I do not think a simple verbal warning would be appropriate in this situation.
All in all, I have to give a - Support in this instance. For your next application try fixing up some of the things that I touched on above, and I think you'll then be a lot more successful!