Hello,
I brought your idea up to the team and unfortunately, we will be declining this suggestion at this time. After much consideration, the team came to the conclusion that this will encourage players to message staff when they are in need of assistance which could disturb them if they are busy working on things and the said member of staff may not be able to aid them with the issue at hand. Also, players may check if a member of staff is online so they can break the rules. As a side note, the ticket system is the best way to get help from a member of staff as it can be seen by everyone on the staff team and the chances of someone whom can help with the issue at hand is much higher than randomly messaging someone.
Once again, thank you so much for making a suggestion though! We greatly appreciate it!