Given that reckless hacking not just saves an action but saves a roll, with the risks that come with any opposed roll, I'm good with the -5. As is I see two likely circumstances for it:
- Quickly dealing with lower rating targets. Like say someone not protected by a host, running a rating 4 or less link as the key to their PAN. The hacker at -5 probably beats the 8 dice of the defense without edge most of the time. Which is great for 'oh bugger, we need to stop him from sending a warning with his link' or the like.
- When the hacker has a high edge pool, only needs a single matrix action to complete their goal, and is dealing with a tough target (i.e. one where they have only a one or two die advantage on) It might actually be better to take the -5 and plan on using a point of edge, rather than to possibly have to edge both the roll to get a mark and the roll to complete an action.