Use ACTION_DROP to Limit HTTP/FTP Access?

We are thinking about limiting HTTP/FTP access by using the “base/frameworks/notice/actions/drop.bro” script: only allow HTTP file upload and FTP put/mput commands from specified IP addresses.

Is it possible to accomplish this by simply modifying http/ftp scripts from the Bro script packages? Does anyone have sample scripts for using ACTION_DROP for HTTP or FTP traffic? I couldn’t find out any usages of ACTION_DROP in the installed bro scripts.

Thank you,