Even if you have a safe bookmark (even if you manage to bury the filament) - be wary of roaming fleets looking for the tell-tale signs of Triglavian filaments. Upon exit from one trip I found literally a dozen or more Hecates, Jackdaws, Stratios, etc. just waiting for me. Had I not limited myself to F3 filaments and below - I’d have been toast.
TLDR; Don’t go suspect in high-sec. Make them earn that gank.