Adding tables to the TS database - cons?

System

We are needing to create a new table in an Oracle database to write some vendor data we receive during one of our workflow processes - this data will be used for reporting purposes. It will be a standalone table - no relationship to any other tables.

We don't want to use our application (website) database because it takes an act of **** to update that database in production, and this data will be used by our team only to provide a report to our marketing users. We can't create a new database because our DBAs are a weird bunch and denied that request.

That leaves us with wanting to add this table to our TS database. Has anyone done anything like this? I realize we may lose a bit of support if we mess with that database, but are there any other reasons why this would be a bad idea?