Yes you can! Me and Stratiz have made it easy for the system to be modified to any use you wish to implement. If you need any help, let me know. You could do something similar to that, as we added a while loop to instantly ban a player when a new piece of data is posted. In your case, you want it to be removed, so you could get the Roblox game to get it removed, so you could do the following;
{message,status,isposted}
--example
{"Hello world!",true,true}
The server would then check if something new is there, if the 3rd value of it is true, then it posts it. And then the Roblox game would post a request to change it to this;
{"Hello world!",true,false}
This would keep it from posting it again.
Now that is if you want to do this with Google Sheets ( I don’t recommend Google Sheets, but you could use it if you wish. )
I highly recommend for this having WebHosting or using other sources. Keep in mind, they would all work very similar. So you should have a fine understanding.