This is a friendly notice for your own information. What you do with it is up to you. I do not intend to threaten any user with DWG action. However, if you make any inappropriate changes, it may result in such action.
Whether other people do this or not does not matter for this.

Please use proper sources in future edits. See also https://wiki.openstreetmap.org/wiki/Good_practice#Do_not_trace_from_outdated_imagery