This kind of thing really worries me! I used to work for an Airsoft retailer, and I remember what happened when cheap rubbish flooded the market.. with all kinds of sadistic looking weapons ending up in high street shops in inner cities!
I do sometimes wonder why people need machetes, kukri's, serrated knives and axes that look like Conan prop's. If the powers that be do ban knife sales, like they did replica small arms/pistols etc.. then it will be stuff like these easily affordable axes' that end up being associated with our hobby, and will be the cause of the demise of uk knife market!
Personally, I think all you need is a Mora.a saw, and an axe! Your average thug can't afford a Gransfors, nor are you likely to see them in every high street!
Keep the prices high, limit availability, and keep the hobby just under the Government radar (that's my rant for the day).
jimbo.