I'd thought about it, but working from home I felt that whilst monitoring the recordings might be amusing there isn't any real need. But I agree, it would act as a deterrent.
There is a story, possibly apocryphal, of an IT graphics consultant that had a number of high end work stations in his home office.
Whilst on holiday thieves broke in and stole the lot,
All the cameras were sound activated and as all the data went straight into the net and a remote server it was all recorded, HD sound and vision. they system alerted him to an incident: he watched it on his phone and he called the Police to report it. They asked him to call round on his return with the recording
On returning he went to the police and gave them a USB drive with the recording. The Police watched it with him, took a statement and arranged for a SOC team to go round to collect DNA as from the video it was clear that the thieves had not been wearing gloves.
A few days later the Police called to say the boys had all been arrested as they were recognised from the video. They denied everything but then pleaded guilty when charged, after the Police showed their lawyer the video....
So, if you have valuable stuff a good HD video security system is good, but it must record to somewhere off site. Most cheap systems don't, they store the data in the property in something that can be stolen.
BTW, dogs are useless: my sister in law had all her computer stuff stolen from a room, she uses as a home office, they broke in through a window. The two Rotweilers in the hall went nuts, but the idiots at least had the sense not to open the door from the office!