In gentleness, I think it's helpful to be mindful of personal policies (i.e. personal scruples) that might be more restrictive than Disney policy. As it's been mentioned, there isn't a Disney room check policy to insure a guest is physically present in the room at certain times of day, however, for example, there is a Disney policy that says one must be listed on the DVC reservation in order to use the facilities, as well as hop at pools available according to policy and capacity.
One's more restrictive personal policies might be equivalent to personal opinion. In that regard this forum serves to share, without vilification, differences of opinion that don't equate to advocation of Disney rule-breaking. Because utilizing available options that Disney offers to guests may be an allowable practice, personal viewpoints (often defined or accompanied by "should") may make the practice acceptable to some and wholly unacceptable to others.
I hope folks will continue to share what they believe are allowable practices per Disney policy, as well as separately opine additional personal policies/opinions regarding acceptable practices.