Here are three scenarios, if you work with SQL Server either as a provider of database environments (DBA) or a consumer of database environments for your application (developer) then you will likely see yourself in one of these descriptions. If you don't please 100% find some way to tell me (email, comment below etc.)
Prod FTW'ers – There is only one place where the developers can develop. DBA's (if you have one) complain every so often about someone using “sa” on production, whoever is using the “sa” account, keeps leaving open transactions in SSMS blocking all the users.