I think the concept of "impact vs. intent" is important here. It may not be your intent to appropriate other cultures, but it's happening and likely creating an impact nevertheless. For you, locks are unlikely to bring harm. For a Black person, that's not necessarily the case.
I acknowledge that white people who have locks for spiritual reasons is an interesting subject. The locks were originally both a spiritual and social symbol, aligning wearers with Rastafari and resistance to white oppression. Whether the two can be disentangled isn't really my place to say.
As a white Caribbean-American woman who has spent limited time in Europe, my perspective is also limited when it comes to these issues overseas. I'd love to hear from Black people in Italy, if that's where you're living, and learn about their thoughts on this.