Yeah, I pretty much was doing that. For these leagues I was using roughly 88-112 margins (quite a bit wider than the ones I was using for the PL or Championship), which I thought would cover the lack of knowledge of the markets and the fact that I was using static odds that weren't my own. I did consider using a bot as well because of this, but just never got round to that.
The match odds were never unmanaged, I wasn't that stupid. But fair point on the draws being overpriced. The thing that made me question it is, whilst I had a feeling letting the odds go in-play wasn't a good idea, two of the three weeks I actually did this were probably my two best weeks, with profits of something like 12%. Luck, I guess.