In cases where people do not fully explain themselves and we don't fully know their intent or the causes for the details of what transpired, it's typical to wonder 'stupid or evil'?
This is so common in today's heavily manipulated world (plausible deniability is a standard method of defence used by all manner of total shit-stain humans), that we really need a new term to be coined that identifies the person in question as having wandered into territory where it is reasonable to presume that they are acting nefariously simply because they didn't explain themselves sufficiently for us to know otherwise.
This term needs to focus on the person's combined likely lack of intelligence and their lack of respect for others who read their words... Maybe it should be a verb.. such as 'timescamming' - e.g. they are at the very least scamming people of the time they need to invest in reading their 'poorly thought out' ideas.